137903819 has 4 divisors (see below), whose sum is σ = 138127944. Its totient is φ = 137679696.

The previous prime is 137903807. The next prime is 137903849. The reversal of 137903819 is 918309731.

137903819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 918309731 = 2423 ⋅378997.

It is a cyclic number.

It is not a de Polignac number, because 137903819 - 2⁴ = 137903803 is a prime.

It is a super-2 number, since 2×137903819² = 38034926589569522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137903849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111137 + ... + 112370.

It is an arithmetic number, because the mean of its divisors is an integer number (34531986).

Almost surely, 2^137903819 is an apocalyptic number.

137903819 is a deficient number, since it is larger than the sum of its proper divisors (224125).

137903819 is an equidigital number, since it uses as much as digits as its factorization.

137903819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224124.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 137903819 is about 11743.2456757065. The cubic root of 137903819 is about 516.6448418576.

The spelling of 137903819 in words is "one hundred thirty-seven million, nine hundred three thousand, eight hundred nineteen".